<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/mn.png" alt />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
         <el-menu
        background-color="#333744"
        text-color="#fff"
        active-text-color="#409EFF"
        :unique-opened="true"
        :collapse="isCollapse"
        :collapse-transition="false"
        :router="true"
        :default-active="activePath"
              >
      <!-- 一级菜单 -->
        <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
          <!-- 一级菜单的模板区域 -->
          <template slot="title">
            <!-- 图标 -->
            <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
            <span>{{item.authName}}</span>
          </template>
          <!-- 二级菜单 -->
            <el-menu-item :index="'/' + subItem.path" v-for="subItem in item.children"
             :key="subItem.id" @click="saveNavState('/' + subItem.path)">
               <template slot="title">
            <!-- 图标 -->
            <i class="el-icon-menu"></i>
              <!-- 文本 -->
            <span>{{subItem.authName}}</span>
          </template>
            </el-menu-item>
          </el-submenu>
      </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menulist: [],
      iconsObj: {
        125: 'iconfont iconuser',
        103: 'iconfont icontijikongjian',
        101: 'iconfont iconshangpin',
        102: 'iconfont icondanju-tianchong',
        145: 'iconfont iconshujubaobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接
      activePath: ''

    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      console.log(res)
    },
    // 点击按钮,切换菜单的折叠
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }

  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
  img {
    width: 70px;
    height: 60px;
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #FFF;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
